init backend

backend/.gitignore

@@ -0,0 +1 @@
+target

backend/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "warren"
+version = "0.1.0"

backend/Cargo.toml

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+[package]
+name = "warren"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

backend/src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}